The quality of being fluent.

(mathematics, obsolete) A continuous variable, especially one with respect to time in Newton's Method of Fluxions.

That flows; flowing, liquid. / (linguistics) Able to use a language accurately, rapidly, and confidently – in a flowing way.

plural of fluent

Socially adept.

(software engineering) An object-oriented application programming interface whose design relies extensively on chaining methods together, with the aim of improving code legibility.

plural of fluent interface

In a fluent manner, as expressing oneself easily, especially in a foreign language. / In a fluent manner, as having graceful movements. / In a fluent manner, as literally flowing.